Pattebw-clamp



2. C. KEER.

PATTERN CLAMP.

APPLICATlON FILED 05c. 30. 1914;

Patented Aug. 8, 1916.

HUM HI wil /teases JAMES, C. KEER, 0F COLUMBUS, OHIO.

PATTERN-CLAMP.

Application filed December 30, 1914. Serial No. 879,786.

To all whom it may. concern Be it known that I, JAMES C. KEER, a citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented certain new and useful Improvements in Pattern-Clamps, of which the following is a specification.

My invention relates to the improvement of pattern clamps or devices for uniting the wooden pattern sections during the course of the construction of a pattern.

The objects of my invention are to provide simple and effective clamping or connecting devices adapted to unite or firmly bind together previously glued pattern sec tions; to so construct my improved clamping devices as to admit of previously glued sections of wood patterns being firmly drawn into connection with each other and retained in such connection until the glue has sufiiciently dried; to so construct said clamping devices as to permit of the quick withdrawal ordinary claw hammer and to produce other improvements, the details of whichwill' be more fully pointed out hereinafter.

The preferred embodiment of my invention is shown in the accompanying sheet of drawings, in which similar characters of ref erence designate corresponding parts, and in which:

Figure 1 is a plan view of three pattern segments united by my improved clamps, Fig. 2 is aside elevation of the same, Fig. 3 is a sectional view on line 3-3 of Fig. 2, Fig. 4 is a side elevation of a modified form of clamping plate, of the same.

Each of my improved clamping devices comprises a clamping plate 1, which may be of the disk form shown in Figs. 1 and 2 or may be of other desirable outline, such for instance as that shown in Figs. 4 and 5. The upper or outer face of the plate is preferably beveled as shown, imparting thereto a substantially frustum cone shaped form. From the center of the upper fiattened portion of the plate extends upwardly a short stem 2 which in turn has its upper end formed with an annular flange 3, resulting in the production of anannular stem recess 4. The underside of the plate 1 is preferably slightly concaved as indicated at 5 and a nail opening 6 is formed centrally through the body of the plate and its stem. In order to illustrate the opera- Specification of Letters Patent.

of the same by the aid of an and Fig. 5 is a plan view Patented Au 8, 1916.

tion of my device, I have shown three sections of a partially completed circular wood pattern, the curved segment or section 7 being in the usual manner affixed to the upper sides of the segments 8 by gluing. The glue having been applied to the contacting surfaces of the segments and it being desired to bind or clamp the upper segment 7 in connection with the segments 8 during the drying of the glue, the clamping plates 1 are successively placed with their concaved under sides upon the upper face of. the outer pattern segment and a nail of suitable length driven downward through the opening 6 o the stem and plate body 1, the nail piercing the upper segment and entering the lower fvoy segment in the manner indicated in the drawing. By driving the head of the nail tightly against the upper end of the plate stem, it is obvious that the binding plate 1 may have the marginal portion of its underside due to its concave form, clamped or pressed so closely into engagement with the upper surface of the upper segment, as to.

segments of the pattern together, by the I aid of what is well known as a screw clamp,

considerable manipulation, does not always provide a perfect vertical pressure of its jaws on the united segments, with the result that the contact or pressure of the segments against each other is not uniform.

When the various segments of the pattern to be produced have been thus united and the glue between the segments has dried sufficiently, each of the clamps may be quickly and efiectively disconnected from the pattern segments and the nail withdrawn therefrom by engaging the annular stem recess 4 by the claws or fingers of an ordinary claw hammer or other similar or convenient tool and pressing downward on the handle of the tool to attain the desired nail pulling leverage. This being accomplished, the upper side of the partially completed pattern may be dressed to the desired but'such a clamp in addition to requiring stem, the latter having a peripheral recess formed between the body of the plate and 15 the upper end of the stem, said plate and stem having a nail receiving opening therethrough, said plate being furtherprovided with a concaved under surface.

In testimony whereof I aflix mysignature 20 in presence of two witnesses.

JAMES c. KEER.

Witnesses I KAY C. KINcK, lVAL'rER E. L. 13001:. 

